Use C++11 range-based loop for core/clipboard, core/dom and core/testing

Source/core/dom/ElementData.cpp

Index: Source/core/dom/ElementData.cpp
diff --git a/Source/core/dom/ElementData.cpp b/Source/core/dom/ElementData.cpp
index c7c8e6cc052d95f3524ad6369da62f81d69e9623..a31f0c52dadfbecf41ccdbafa643af4c90c4b445 100644
--- a/Source/core/dom/ElementData.cpp
+++ b/Source/core/dom/ElementData.cpp
@@ -114,10 +114,9 @@ bool ElementData::isEquivalent(const ElementData* other) const
     if (attributes.size() != otherAttributes.size())
         return false;
 
-    AttributeCollection::iterator end = attributes.end();
-    for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
-        const Attribute* otherAttr = otherAttributes.find(it->name());
-        if (!otherAttr || it->value() != otherAttr->value())
+    for (auto& attribute : attributes) {

[Julien - ping for review, 2015/01/02 09:42:02]

const auto&

or better:

const Attribute*

[zhaoze.zhou, 2015/01/05 15:17:57]

Done.

+        const Attribute* otherAttr = otherAttributes.find(attribute.name());
+        if (!otherAttr || attribute.value() != otherAttr->value())
             return false;
     }
     return true;